My answer in short, is BOTH. But lets delve into WHY!

First off let me start by addressing this very common mentality people still have of needing to separate cardio exercise from weight training. This way of thinking is out-dated and just plain false. Many of us are still influenced by this old-school mindset which falsely labels and separates 2 “types” of exercising at extreme ends of the spectrum- Either you weight lift to bulk up like a bodybuilder OR you do an hour of steady state aerobic exercise to lean out like a marathon runner.
[…]